<script setup>
import { userLoginServiceApi, userRegisterServiceApi } from '@/api'
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { useUserStore } from '@/stores'
import { ElMessage } from 'element-plus'
import { useRouter } from 'vue-router'

const router = useRouter()
const userStore = useUserStore()
const isRegister = ref(false)
const form = ref()
const ruleForm = ref({
  username: 'xiaoming32',
  password: '111111',
  repassword: '111111'
})

watch(isRegister, () => {
  ruleForm.value = {
    username: '',
    password: '',
    repassword: ''
  }
})

// 整个表单的校验规则
// 1.非空校验 required:true message消息提示，trigger触发校验的时机blur(失焦) change(改变)
// 2.长度校验 min:xx，max:xx
// 3.正则校验 pattern(见^钱$眼开):正则规则 \S 非空字符
// 4.自定义校验 =>自己写逻辑校验(校验函数)
//   validator:(rule,value,callback)
//     (1)rule 当前校验规则相关的信息
//     (2)value 所校验的表单元素目前的表单值
//     (3)callback无论成功还是失败，都需要callback回调
//        - callback()校验成功
//        - callback(new Error(错误信息))校验失败

const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 10, message: '用户名必须是5-10位的字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须在6-15位之间',
      trigger: 'blur'
    }
  ],
  repassword: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须在6-15位之间',
      trigger: 'blur'
    },
    // 自定义校验
    {
      validator: (rule, value, callback) => {
        if (value !== ruleForm.value.password) {
          callback(new Error('两次密码输入不一致'))
        } else {
          callback()
        }
      },
      trigger: 'blur' //默认不写是change
    }
  ]
}

const register = async () => {
  // 进行整体预校验
  // form.value 拿到form的组件实例
  await form.value.validate()
  // 开始注册
  await userRegisterServiceApi(ruleForm.value)

  ElMessage.success('注册成功')
  isRegister.value = false
}

const login = async () => {
  await form.value.validate()
  const {
    data: { token }
  } = await userLoginServiceApi(ruleForm.value)
  // 不能通过userStore.token直接进行赋值
  userStore.setToken(token)
  ElMessage.success('登录成功')
  router.push('/')
}
</script>

<template>
  <!-- 
    1、结构相关
      el-row表示一行，一行分成24份
      el-col表示列
        (1):span="12" 代表在一行中，占12份(50%)
        (2):span="6"  表示在一行中，占6份(25%)
        (3):offset="3" 代表在一行中,左侧的偏移量

      el-form 代表整个表单
      el-form-item表单的一行(一个表单域) 
    2、校验相关
      (1)el-form => :model="ruleForm" 绑定整个form的数据对象 { xxx, xxx, xxx }
      (2)el-form => :rules="rules"   绑定整个rules的数据对象 { xxx, xxx, xxx }
      (3)表单元素 => v-model="ruleForm.xxx" 给表单元素绑定ruleForm的子属性
      (4)el-form-item => prop配置生效的是哪个校验规则(和rules中的字段要对应)
  -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <el-form
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
        :model="ruleForm"
        :rules="rules"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            :prefix-icon="User"
            placeholder="请输入用户名"
            v-model="ruleForm.username"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
            v-model="ruleForm.password"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
            v-model="ruleForm.repassword"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="register"
            class="button"
            type="primary"
            auto-insert-space
          >
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <el-form
        :model="ruleForm"
        :rules="rules"
        ref="form"
        size="large"
        autocomplete="off"
        v-else
      >
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="ruleForm.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            name="password"
            :prefix-icon="Lock"
            type="password"
            v-model="ruleForm.password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button
            class="button"
            type="primary"
            auto-insert-space
            @click="login"
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background:
      url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
